ArrayList<String[]> Sorting First Elements

Question

public ArrayList<String[]> customerArray= new ArrayList<String[]>();

The first elements are String type, I want to make them Integer and sorting.

35 Murat Kaya 236-3446789 Address: Dikmen 4. Cadde 34/2
45 Hatice AK 568-8969746 Address: Cebeci 56 cd. 34/5

It is part of this file.

what do you mean by The first elements are String type do you mean 35 and 45 ? — Youcef LAIDANI
– Youcef LAIDANI, Commented Apr 13, 2018 at 16:59
It's of course possible, but this is the wrong way of solving the problem. Start by transforming your arrays of strings into objects of a well-defined class, with named, typed properties, and then sort these objects. — JB Nizet
– JB Nizet, Commented Apr 13, 2018 at 17:00
Yes, 35 and 45. Basically, I want to sort them by id number. — Mert Yanık
– Mert Yanık, Commented Apr 13, 2018 at 17:01

Ousmane D. · Accepted Answer · 2018-04-13 17:00:11Z

4

You can achieve it like so:

customerArray.sort(Comparator.comparingInt(e -> Integer.parseInt(e[0])));

answered Apr 13, 2018 at 17:00

Ousmane D.

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Comments

mavriksc · Accepted Answer · 2018-04-13 17:05:28Z

1

customerArray.sort((sa1,sa2)->Integer.parseInt(sa1[0])-Integer.parseInt(sa2[0]));

answered Apr 13, 2018 at 17:05

mavriksc

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